Influence of complex impact of the picosecond electron beam and volume discharge in atmospheric-pressure air on the electronic properties of MCT epitaxial films surface

Denis V. Grigoryev; Vadim A. Novikov; Dmitriy A. Bezrodnyy; Viktor F. Tarasenko; Michail A. Shulepov; Sergei A. Dvoretskii

doi:10.1117/12.2224696

15 December 2015 Influence of complex impact of the picosecond electron beam and volume discharge in atmospheric-pressure air on the electronic properties of MCT epitaxial films surface

Denis V. Grigoryev, Vadim A. Novikov, Dmitriy A. Bezrodnyy, Viktor F. Tarasenko, Michail A. Shulepov, Sergei A. Dvoretskii

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Proceedings Volume 9810, International Conference on Atomic and Molecular Pulsed Lasers XII; 98100S (2015) https://doi.org/10.1117/12.2224696
Event: XII International Conference on Atomic and Molecular Pulsed Lasers, 2015, Tomsk, Russian Federation

Abstract

In the present report we studied the distribution of surface potential of the HgCdTe epitaxial films grown by molecular beam epitaxy after the impact of picosecond electron beam and volume discharge in atmospheric-pressure air. The surface potential distribution was studied by the Kelvin Force Probe Microscopy. The experimental data obtained for the variation of the contact potential difference (ΔCPD) between the V-defect and the main matrix of the epitaxial film. The investigation of the origin epitaxial films show that variation of the spatial distribution of surface potential in the V-defect region can be related to the variation of the material composition. The experimental data obtained for the irradiated samples show that the mean value of ΔCPD for the original surface differs from the one for the irradiated surface for 55 eV. At the same time the mean value of ΔCPD changes its sign indicating that the original surface of the epitaxial HgCdTe film predominantly contains the grains with increased cadmium content while after the irradiation the grains possess an increased content of mercury. Therefore, during the irradiation process a decrease of the mercury content in the near-surface region of the semiconductor takes place resulting in the alteration of the electrophysical properties in the films near-surface region.

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Denis V. Grigoryev, Vadim A. Novikov, Dmitriy A. Bezrodnyy, Viktor F. Tarasenko, Michail A. Shulepov, and Sergei A. Dvoretskii "Influence of complex impact of the picosecond electron beam and volume discharge in atmospheric-pressure air on the electronic properties of MCT epitaxial films surface", Proc. SPIE 9810, International Conference on Atomic and Molecular Pulsed Lasers XII, 98100S (15 December 2015); https://doi.org/10.1117/12.2224696

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KEYWORDS

Crystals

Mercury

Solids

Electron beams

Cadmium

Picosecond phenomena

Mercury cadmium telluride

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